Street-sweeper.



A. F. ELLIS.

STREET SWEEPEB.

APPLICATION mm Jun 3. I917.

Pa tenfmdl m. 5,1918... 2 SHEETS-SHEET l HUI "ni' l lilll r l l l A. F.ELLIS.

S'KBMT SWEEPER. APPLICATION FILED JULY 3. 1911.

Patemfifl Feb. 5, 191.

2 SHEETS-SHEET 2.

l lit lilllllit l whom it y ounce:

- Be it hown that it Are F. Ems, a citizen of the United States, and aresident 63f Boston, in the county of Suolk and tub tm vent certain newand useful Improvements in Street-Sweepers, of which the following is aclear, and exact specification.

This invention relates to that class of street sweepers wherein the dustand dirt are swept up-and conveyed into a receptacle carried the machine;-and it has for its object the ecting of means whereby the sweepin andath" means may be yieldingly brougt alongside the curbwithout danger ofbreakage, and thereby to clean the gutter close up to the curbstone; tomeans for preventing the line dust aroused by the sweeper brush romescaping to the atm here; and o certain improvements in details ofconstruction. o s

eferring to the drawings fo :wrpart of this sperhfication, Figure l is aside elevation of a sweeping machine embodying my improvements, partsbeing represented as broken away. -Fig. 2 is a plan. view of the chassisand. main operative mechanism of the sweeper. i Fig. 2 is a sectionaldetail view of a portion of the brush suppo m; arm and bar. Fig. 3 is avertical transverse section of the machine. Fig. 4- is a perspectiveview of the dust collect ng apparatus.

In Fig. l, the reference numeral 1 designates the chassis of theauto-truck with which the sweeper is combined; 2, are thedrivers; and 3,the dirt receiving bin. The sweeping and collecting means are connectedwith, and mainly supported by, a bar l slidable in ways 5 transverselyof the chassis frame 11, the sweeper comprisin a rota brush 6 having itsbearin in tlie arms depending from the ends 0 the bar, and rotat bymeans of power taken from one of the drivers 2, preferably by means of arope drive-9, and a pulley 10 on the driver, and a suitable ulley' onthe brush shaft.

The" dust and dirt swept forward by the brush are received b a wormconveyer ll feeding toward its ongitudinal center, at which point anelevating conveyer '12 takes the same and carries the debris up to aspout or chute 13 by which it is directed into the bin 3. To normallylocate the sweeper and connected parts centrally with respect to theohms, I provide two l cit on "14':

ttpcnon of w :1 a mutant. hppltcahon rat at a raw. terlall ll'o. avatar.

onwealth of Massachusetts, have ineach attached at one end tothe chisframe, and at the other end to the bar 4, so that whlle sald parts canbe oved transversely of the chassis, the springs will brin the same backto normal.

prefer to make the elevator 12 substantlally circular, as shown in Fig.3, although l do not restrict myself to this exact form, and to have itsuppermost point pivotally supported by the bin or otherwise, while itslowermost section is attached to the hood 15. This hood is provided forkeeping the dust from escaping, and is sufliciently loose to permit theslight rocking motion of the elevator.

Theelevator comprises, in addition to the case 12, an endless cableor'the like 17 carrying disks 19 by which the dirt is moved, and thlscable is preferably actuated by-a wheel 20 having notches 21 entered bythe disks.

To further keep the dust from escaping 22 connected at one end with theapron or "hood l5, and at the other end with a box 23.

][n this box is a suction blower 24 adapted to receive the dust and todischarge it through its outlet 25 against the surface of an endlessapron 26 which is kept in constant motion.

The air from the blower passes through one thickness or section of the.apron into the hollow square bounded thereby, and thence escapes withits impulse much checked, through the lowermost section and then throughan opening 27 in the top of the bin into t e bin itself. The air fromwithin the bin escapes from an opening 29 in to forward gart of the top;As the air thus escapes, the

ust is first collected upon the surface of the apron adjacent theblower, and then as the apron passes down and thence over the opening'27, the dust thus collected is dislodged by' the descending air currentand deposited in the bin. To aid this, a revolving'brush 30 may beemployed.

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The operation of this cleaning machine is i as follows: As thechaufi'eur guldes the ma chine along a street, the revolving brush 6gathers up and throws forward the dust and dirt into the path of theworm conveyer. This moves the dirt toward its midlength, where it isreceived in the elevator 12 and carried up to the conduit or chute 13from which the dirt descendsinto the bin.

As already described, what dust is liable to ape from the hood part isdrawn up through the flexible tube 22 and finally delivered into the binwith the dirt carried up by the elevator.

To enable the truck to be speeded. up when going from one section of thecity to another, I prefe'rto have the sweeper portion ada ted to beraised out of touch ,Wlllh the roa way, as indicated, in Fig. 1,suitable means eing provided for permitting the chauffeur to raise andlower it. Cams 31 controlled by rockshafts 32 may be employed for thepurpose.

I'have shown the dust separating box 23 as supported on to of the bin 3,butI do not restrict "mysel to this location. Thus positioned, the binis stationary upon the chassis, and has a door 33 at its rear end,

- and a false front 34 which can be drawn rearward by a handle 35 foremptying the 2, and the arm 7 at that side of the machine comes incontact with the curbstone, there is no danger of bending or breakingthe parts by such collision, since the arm 4 can slide relative to thechassis for several inches, the spring 14 at the other side yielding topermit such movement. The chauffeur, knowing by the slight scrapingsound that the machine is traveling nearer the side walk than necessary,steers the truck slightly farther away until he hears onl an occasionalscrape of the arm 7 witii truck, as the shaft 40, or with other of thetruck orthe chauffeur himself.

. versel the curbstone,- gthereby cleaning the gutter close to the curbwithout the possibility of injury to the machine.

The purpose in making the elevator endless, as shown in Fig. 3, is toenable the dirt swept up by the sweepin means to be delivered to the topof the iii-,3 without interference with the mechanism of the autoparts Ido not claim inthis application the dust separating apparatus, but wishto reserve the same for a subsequent application.

What I claim is: 4 1. A street swee er comprising a conveyance, a barslidab y carried b the conveyance to project beyond the si es of thelatter, springs acting normally to-retain said bar centrally of theconveyance, and a revolving brush carried by said bar.

2. A street sweeper comprisin a truck having driving wheels, a bar sliably car- .ried b the conveyance to project beyond the si es of thelatter, a rotary brush carried by the said bar having a pulley, a pulleycarried by one of the drlving wheels, said pulleys havin dee grooves,and a rope drive joining t e sai pulleys.

3. A street sweeper comprisin a chassis frame, a channel iron bar extening transof the frame and projecting from its si es, the flanges of saidbar being beneath, anti-friction rollers suitably supported and fittingbetween said flanges, springs normally retaining said bar centrally, anda rotary brush supported by said bar.

In testimony that I claim the foregoing invention, I have hereunto setmy hand this 30th day of June, 1917.

ARCHIBALD F. ELLIS.

